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Engine-Codes – GMC – P2151 2016 GMC Sierra

P2151 2016 GMC Sierra Code - Cylinder 2 Injector High Control Circuit High Voltage

Quick Answer

The P2151 diagnostic trouble code (DTC) for a 2016 GMC Sierra specifically indicates an issue with the Cylinder 2 Injector High Control Circuit High Voltage. Common causes include Faulty fuel injector in cylinder 2, Wiring issue in the control circuit, PCM malfunction. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2151 2016 GMC Sierra indicates Cylinder 2 Injector High Control Circuit High Voltage.
Common causes
Common causes include Faulty fuel injector in cylinder 2, Wiring issue in the control circuit, PCM malfunction.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 26, 2024
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Code P2151 2016 GMC Sierra Description

The P2151 diagnostic trouble code (DTC) for a 2016 GMC Sierra specifically indicates an issue with the Cylinder 2 Injector High Control Circuit High Voltage. This code is typically triggered when the powertrain control module (PCM) detects that the voltage in the control circuit for the fuel injector in cylinder 2 is higher than the specified range. The fuel injector is responsible for delivering the precise amount of fuel into the combustion chamber for proper engine operation.

OBDII Code P2151 2016 GMC Sierra - Cylinder 2 Injector High Control Circuit High Voltage
P2151 2016 GMC Sierra Code - Cylinder 2 Injector High Control Circuit High Voltage

Common Causes of P2151 2016 GMC Sierra

  1. Faulty fuel injector in cylinder 2
  2. Wiring issue in the control circuit
  3. PCM malfunction
  4. Mechanical problem in the engine
  5. Corrosion or damage to electrical connections

Symptoms of P2151 2016 GMC Sierra

  1. Engine misfires
  2. Rough idle
  3. Reduced power output
  4. Poor fuel economy
  5. Stalling or difficulty starting

How to Fix P2151 2016 GMC Sierra

  1. Begin by conducting a thorough inspection of the fuel injector in cylinder 2, checking for any signs of damage or malfunction.
  2. Test the wiring in the control circuit to ensure there are no breaks, shorts, or other issues affecting the voltage.
  3. Use a multimeter to check the voltage levels in the control circuit and compare them to the manufacturer's specifications.
  4. If the issue persists, consider replacing the fuel injector in cylinder 2 or addressing any other identified problems in the circuit or engine.
  5. Clear the DTC from the PCM memory and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P2151 2016 GMC Sierra

The typical repair costs for addressing a P2151 code in a 2016 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a fuel injector or addressing wiring problems can range from $200 to $500, including parts and labor. However, the total cost may increase if additional components need to be replaced or if more extensive repairs are required. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle. Keep in mind that labor rates can vary, so it's advisable to inquire about rates in your local area for a more precise cost estimate.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2151 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P2151 in a 2016 GMC Sierra?

The common symptoms of code P2151 include rough idling, engine misfires, decreased fuel efficiency, and potential stalling of the vehicle.

2. What does the OBDII code P2151 for a 2016 GMC Sierra indicate?

Code P2151 indicates an issue with the Cylinder 2 Injector High Control Circuit High Voltage in the fuel injection system of the vehicle.

3. What are the possible causes of OBDII code P2151 in a 2016 GMC Sierra?

Possible causes of code P2151 include a faulty fuel injector, wiring issues in the injector circuit, a malfunctioning Engine Control Module (ECM), or a poor electrical connection.

4. How can I troubleshoot a Cylinder 2 Injector High Control Circuit High Voltage issue in my 2016 GMC Sierra?

To troubleshoot code P2151, start by inspecting the wiring and connections related to the Cylinder 2 injector. Check for any visible damage or corrosion that may be affecting the circuit.

5. Can a DIY enthusiast repair OBDII code P2151 in a 2016 GMC Sierra?

While some experienced DIY enthusiasts may be able to address code P2151 by checking and repairing wiring issues, it is recommended to seek professional help for proper diagnosis and repair of the fuel injector circuit.

6. Is it safe to continue driving my 2016 GMC Sierra with OBDII code P2151 present?

It is not recommended to continue driving your vehicle with code P2151 present, as it can lead to further damage to the engine and potentially unsafe driving conditions.

7. How much does it typically cost to repair OBDII code P2151 in a 2016 GMC Sierra?

The cost of repairing code P2151 can vary depending on the exact cause of the issue. It is advisable to consult a mechanic for an accurate diagnosis and cost estimate.

8. Will resetting the OBDII code P2151 in my 2016 GMC Sierra make it go away permanently?

Simply resetting the code may temporarily clear the check engine light, but if the underlying issue causing code P2151 is not addressed, the code is likely to reappear.

9. Can a dirty fuel injector cause OBDII code P2151 in a 2016 GMC Sierra?

While a dirty fuel injector can potentially cause issues with fuel delivery, code P2151 is more commonly associated with electrical circuit problems rather than injector cleanliness.

10. How urgent is it to address OBDII code P2151 in a 2016 GMC Sierra?

It is important to address code P2151 promptly to prevent further damage to the engine and ensure the proper functioning of the fuel injection system in your 2016 GMC Sierra.

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